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Tentative fix for race condition

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This commit is contained in:
Laurent Fasnacht 2014-06-12 13:53:50 +02:00
parent b194e19708
commit 68ad323e84
1 changed files with 10 additions and 9 deletions
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19
src/threadqueue.c
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@ -42,7 +42,6 @@ static void* threadqueue_worker(void* threadqueue_worker_spec_opaque) {
for(;;) {
int i = 0;
int signal_count = 0;
threadqueue_job * job_to_run = NULL;
PTHREAD_LOCK(&threadqueue->lock);
@ -88,6 +87,7 @@ static void* threadqueue_worker(void* threadqueue_worker_spec_opaque) {
//Ok we got a job (and we have a lock on it)
if (job_to_run) {
int queue_waiting_dependency_decr, queue_waiting_execution_incr;
threadqueue_job * const job = job_to_run;
assert(job->state == THREADQUEUE_JOB_STATE_QUEUED || (job == next_job && job->state == THREADQUEUE_JOB_STATE_RUNNING));
@ -121,9 +121,10 @@ static void* threadqueue_worker(void* threadqueue_worker_spec_opaque) {
job->state = THREADQUEUE_JOB_STATE_DONE;
signal_count = 0;
next_job = NULL;
queue_waiting_dependency_decr = 0;
queue_waiting_execution_incr = 0;
//Decrease counter of dependencies
for (i = 0; i < job->rdepends_count; ++i) {
threadqueue_job * const depjob = job->rdepends[i];
@ -139,11 +140,9 @@ static void* threadqueue_worker(void* threadqueue_worker_spec_opaque) {
next_job = depjob;
depjob->state = THREADQUEUE_JOB_STATE_RUNNING;
} else {
++signal_count;
++threadqueue->queue_waiting_execution;
++queue_waiting_execution_incr;
}
assert(threadqueue->queue_waiting_dependency > 0);
--threadqueue->queue_waiting_dependency;
++queue_waiting_dependency_decr;
}
PTHREAD_UNLOCK(&depjob->lock);
@ -153,9 +152,11 @@ static void* threadqueue_worker(void* threadqueue_worker_spec_opaque) {
//Signal the queue that we've done a job
PTHREAD_LOCK(&threadqueue->lock);
for (i = 0; i < signal_count; ++i) {
PTHREAD_COND_SIGNAL(&threadqueue->cond);
}
assert(threadqueue->queue_waiting_dependency >= queue_waiting_dependency_decr);
threadqueue->queue_waiting_dependency -= queue_waiting_dependency_decr;
threadqueue->queue_waiting_execution += queue_waiting_execution_incr;
PTHREAD_COND_BROADCAST(&threadqueue->cond);
//PTHREAD_COND_BROADCAST(&threadqueue->cond);
//Don't log this one
//PTHREAD_COND_SIGNAL(&threadqueue->cb_cond);